Bard 171-120 - Heat Exchanger for NB120

The Bard 171-120 heat exchanger for NB120 is an OEM heating section component designed to transfer heat safely and efficiently from the burner system into the supply airstream in compatible Bard wall-mounted gas/electric units. If your unit has a cracked or leaking exchanger, flame rollout issues, or repeated limit trips, replacing the heat exchanger is a critical repair that helps restore proper heat output and maintains safe combustion air separation. Because heat exchangers are model- and revision-specific, confirm your full unit model and serial number before ordering Bard 171-120 to ensure correct fit and alignment with your existing burner and collector components.

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